Seems very easy to do, even without sewing. The frame you can use three pvc pipes with two 90 degree angles and you even can use a tablecloth or a curtain with rope and stakes, or you can use a fun outdoor fabric, is your choice, buy definitely diy, i'll never pay $150 for something that simple
Nappy Bag (combined bag and pillow of soft Cuddle Minky) Finishes at 27" x 43,". Bag easily folds into the lightly-stuffed pillow to form a really soft and snuggly pillow, and straps on the back turn the package into a comfortable backpack, easy to carry or store when not in use. For the car, Grandma's, or daycare for extra security and comfort. Make the grownups jealous! Easy pattern in "Quilts and More" Winter 2013, and fabric kit at the click.